So I like having fern in my apartment and on my balcony. Once a friend of mine has sent me some spores, but forgot where those came from.

Edit: Turns out that the second and third fern are both boston sword ferns, just one is of the "fluffy ruffles" variety.

The fronds of this one are currently about 40cm long I'd say, and seem more "airy" than the others, very thin see-through fronds and wide gaps.



The fronds of this one are about 60cm long, but more slender than those of the other two ferns.




This one basically exploded when I gave him a more sunny spot. The fronds are currently with a length of less than 30cm quite short, but it quickly filled out the entire pot.




Thank you for sharing your wisdom with me. I assume that these are from here in Germany, but I don't know. I looked through some websites with fern identification helps, but I couldn't find them there (probably missed them).